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The optimizing of thickness combination in organic solar cells with the concept of effective exciton generation rate

XI XI1,2,3, XIAOJING CHEN2,3, YING GUO1,3, GUOHUA LI1,3,*

Affiliation

  1. School of Science, Jiangnan University, 1800 Lihu Ave., Wuxi, China, 214122
  2. Wuxi Suntech Power Co., Ltd., 12 Xinhua Road, Wuxi, China, 214028
  3. Jiangsu Optoelectronic Engineering and Technology Research Cente, 1800 Lihu Ave., Wuxi, China, 214122

Abstract

Organic Solar Cells are attracting a great deal of attention now. However, the academic system of organic solar cells is still not so perfect. Most of the active layers’ thickness combinations are carried out from practical experiments. The theoretic process for this subject is still unsubstantial. In this paper, a concept of effective exciton generation rate, based on light intensity distribution, is given. For maximizing this rate, the thickness combination of active layers can be obtained. In order to keep the simulation process closer to practical fabrication, photon flux distribution of AM1.5G and transmisstivity of substrates were introduced into the calculation. Although there an error of a few nanometers exists between the results of simulation and experiments, it is in an acceptable range. The reason of this error has also been analyzed. The main contribution of this method is that it gives a search range of thickness combination of donor and acceptor layers..

Keywords

Organic Solar Cells, Effective Exciton, Generation Rate, Thickness Combination.

Citation

XI XI, XIAOJING CHEN, YING GUO, GUOHUA LI, The optimizing of thickness combination in organic solar cells with the concept of effective exciton generation rate, Optoelectronics and Advanced Materials - Rapid Communications, 9, 5-6, May-June 2015, pp.646-652 (2015).

Submitted at: Feb. 11, 2014

Accepted at: May 7, 2015